Process of manufacturing caster-rollers



(No Model.)

R. B. OODLING. I PROGESS OPIMANUPAGTURING OASTER ROLLERS.

No. 380,790. Patented Apr. 10, 1888.

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ROBERT B. CODLING, OF BRISTOL, CONNECTICUT.

PROCESS OF MANUFACTURING CASTER ROLLERS.

SPECIFICATION forming part of Letters Patent No. 380,790, dated April 10, 1888.

Application filed August 29, 1887. Serial No. 248,125.

To all whom it may concern:

Be it known that 1, ROBERT B. CoDLING, a citizen of the United States, residing at Bristol, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in the Process of Turning Caster-Rollers, of which the following is a specification.

My invention relates to improvements in turning caster-rollers and analogous articles from castings; and the object of my invention is to enable the process to be performed by automatic machinery. Heretofore, so far as I know, such articles have been first drilled and turned upon an arbor, or chucked and turned upon the sides,and then bored and the periphery turned by a subsequent operation.

In the accompanying drawings, Figure 1 is a side elevation of a casting for a caster-roller as formed with special reference for being turned by my process. Fig. 2 is a sectional view of the same on line :20 m, Fig. 1, together with devices for holding and revolving the casting for turning its periphery. Fig. 3 is a sectional View of a finished caster-roller. Fig. 4 is a side elevation of a casting for a ratchet such as are usediu clock-movements, said casting being formed for turning in accordance with my process. Fig. 5 is a side elevation of said casting, together with the devices for holding and revolving it while turning its periphery. Fig. 6 is a sectional view of said ratchet after being turned, and Fig. 7 is asectional view of a pulley such as I contemplate turning by my process.

I first form the castings with a stud or projection, a, on one or both sides,or of such other irregular form as will form an engaging-shoulder or irregular-shaped holdingface for engagement with some projection or other irregular form of driving mechanism, so that when held against said driving mechanism the cast-' ing is necessarily and positively rotated with the driving mechanism.

In Fig. 2, A designates a tapering center for engaging and centering the casting by the inside of its rim, and B designates the driving device, which also centers the casting in like manner, and is provided with an engaging shoulder or stud, b, which, coming in contact with the projectiona, will necessarily revolve (No model.)

the casting with it. In automatic machinery it is of great importance that the driving of the casting shall be positive, as it is evident that when the turning-tool is forced to its work by machinery, if the casting fail to revolve,so that the turning-tool cannot act, the machine Would be disabled; but when Work is turned by hand,and should happen to slip in the holding device, the operatorcan govern the moveshall be given to the casting which will cause it to be positively driven by the driving de vice. This irregular form of driving-faee may be given to one side of the casting only, and this will be the practice in work which has unlike sides, like those of the ratchet illustrated in Figs. 4, 5, and 6; but in'cases where both sides of the article are alike, as in Figs.

'1, 2, 3, and 7, I prefer to form the irregularshaped driving-face upon both sides, as it will permit the castings to be placed promiscuously into a hopper and automatically fed to the work, whereas if the driving-face were only on one side the casting would have to be put into the machine with that side toward the driver B.

When the parts are centered and held for driving, as illustrated in Fig. 2, the periphery c of the caster is turned into the desired shape. So, also, is the periphery of the ratchet turned when it is centered and held for driving, as illustrated in Fig. 5. In this figure the center A is what is termed a female center, and engages the hub of the casting upon one side, the driver B engaging the hub on the other side in like manner,while the shoulder 72 comes in contact with the projection a of the casting, so that it is positively driven. After thus turning the periphery the casting is gripped firmly by its periphery in stationary jaws, which both center the casting and hold it against rotation. Suitable revolving tools are then simultaneously advanced for turning the opposite sides of the casting while it is thus held, in doing which the projection a is cut away. The central hole may also be bored at the same time. The casting is now turned on all of its surface and is finished as far as my present process is concerned; but in some cases it may not be finished in a technical sense, because it may be desirableas,for instance, with ratchets-to roughly turn the casting before it is placed upon its arbor for finishing. Again, in work where it is desirable to have a very smooth and polished periphery, as in casterrollers, if any marks of the holding-jaws remain, the periphery may be smoothed or polished by a subsequent operation; but in many articles there will be no necessity for this subsequent finishing.

l have shown three different articles which may be turned by my process, and it is evident that analogous articles of varying forms may be turned in the same way.

I claim as my invention That improvement in the art of manufacturing caster-rollers and analogous articles which consists of, first, forming the castings with an irregular-shaped driving-face; second, centering and holding said castings with a driving device adapted to engage said drivingface and positively revolve the casting, and turning its periphery while it is thus driven, and, third, gripping the casting in stationary jaws, which grasp said turned periphery, and finishing the sides while it is thus held, substantially as described, and for the purpose specified.

ROBERT B. CODLING.

Witnesses:

A. BROWN, M. L. TIFFANY. 

